Mr Galley, from Feltham, was arrested on November 19 for allegedly leaking the information gathered while he worked for Home Secretary Jacqui Smith.

The 26-year-old has defended his actions, insisting he believed all the information would be used in the public interest.

Tory and Lib Dem MPs have been outraged by the police decision to arrest Mr Green and raid his home and House of Commons office.

This week they also attacked the Government for postponing their inquiry into the matter until after the police investigation is complete and packing the inquiry committee with Labour MPs.

But speaking in the house last week Mr Keen insisted the focus should remain on the Conservatives' handling of the row.

He told the Chronicle today: "If I were offered information that could potentially compromise national security I would call the police. If it didn't but came from a working civil servant I would still tell the person it was not appropriate."

It is understood Mr Galley has been an active in the Feltham and Heston Conservative Association for several years, delivering leaflets and attending social events.